something that is not affected by x; e.g., "a revenue neutral tax plan" does not affect the amount of revenue collected. It might raise taxes in one area and reduce them in another so that the total tax revenue is unchanged.
something that does not affect x; e.g., "a carbon neutral home" is a home that does not affect carbon. Part of its design might include using solar energy to control climate rather than burning fossil fuels.
The committee is suggesting some cost neutral improvements.
They’re encouraging the use of Mx. as a gender-neutral replacement for Mr. and Ms.
In the crucial years, the fact that the Party was not a hereditary body did a great deal to neutralize opposition.
George Orwell -- 1984
In his capacity as an administrator, it is often necessary for a member of the Inner Party to know that this or that item of war news is untruthful, and he may often be aware that the entire war is spurious and is either not happening or is being waged for purposes quite other than the declared ones: but such knowledge is easily neutralized by the technique of doublethink.